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The basic knowledge of air elements

The screw element is the most important part of any screw-type compressor. It’s that part of the machine where the actual compression takes place. It is the heart of the rotary screw air compressor.

Often, the compressor screw element is also called air-end.

They are constant flow (volume) with variable pressure compressors. Which mean that at a given speed (rpm), they always supply the same amount of air (in liters per second for example), but can do so at different pressures.

Why are they so popular? Since it’s a continuous process (as opposed to reciprocating piston compressors) they supply a steady, non-pulsating air flow, with minimum vibrations and maintenance and maximum lifetime.

They can operate 24/7, 365 days a year. The normal lifespan of a screw element is about 40.000 running hours, before a complete overhaul is necessary.

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